| Swansea to Bonhill | 3,905.83 mi (6,285.82 km) |
| Swansea to Bonnyrigg | 3,961.32 mi (6,375.13 km) |
| Swansea to Bootle | 4,030.23 mi (6,486.03 km) |
| Swansea to Borehamwood | 4,185.62 mi (6,736.10 km) |
| Swansea to Boscombe | 4,152.66 mi (6,683.07 km) |
| Swansea to Boston | 4,155.48 mi (6,687.59 km) |
| Swansea to Bottesford | 4,114.14 mi (6,621.07 km) |
| Swansea to Bourne | 4,148.20 mi (6,675.89 km) |
| Swansea to Bournemouth | 4,151.24 mi (6,680.77 km) |
| Swansea to Bournville | 4,098.89 mi (6,596.53 km) |
| Swansea to Bovingdon | 4,173.46 mi (6,716.54 km) |
| Swansea to Bowdon | 4,055.67 mi (6,526.98 km) |
| Swansea to Boxley | 4,227.97 mi (6,804.25 km) |
| Swansea to Brackley | 4,140.76 mi (6,663.91 km) |
| Swansea to Bracknell | 4,174.55 mi (6,718.28 km) |
